* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
ul,
ol {
  list-style: none;
}
.icon {
  width: 1em;
  height: 1em;
  vertical-align: -0.15em;
  fill: currentColor;
  overflow: hidden;
}
#xxx {
  display: block;
}
body {
  overflow: hidden;
}
.action {
  position: fixed;
  left: 0;
  top: 0;
  padding: 20px;
}
.action svg {
  width: 1.5em;
  height: 1.5em;
  margin: 0 10px;
  transition: all 0.2s;
}
.action svg.active {
  fill: red;
  transform: scale(1.2);
}
.color {
  position: fixed;
  left: 25px;
  top: 60px;
}
.color li {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  margin: 20px 0;
  box-shadow: 0 0 3px 1px rgba(0, 0, 0, 0.5);
  transition: all 0.2s;
}
.color .black {
  background: black;
}
.color .red {
  background: red;
}
.color .yellow {
  background: yellow;
}
.color .green {
  background: green;
}
.color .blue {
  background: blue;
}
.color li.active {
  transform: scale(1.2);
}

.sizes {
  position: fixed;
  top: 10px;
  right: 20px;
}
.sizes > li {
  margin: 20px 0;
  transition: all 0.2s;
}
.sizes .thin {
  width: 20px;
  height: 0;
  border-top: 3px solid black;
}
.sizes .thick {
  width: 20px;
  height: 0;
  border-top: 6px solid black;
}
